ダム貯水池におけるカビ臭発生要因の検討
キーワード:
Phormidium tenue,
2-Methylisoborneol (2-MIB),
proliferation test of algae,
Suspended solid,
ratio of nitrogen and phosphorus (N/P)
2007 年 13 巻 p. 23-28
詳細
2007 年 13 巻 p. 23-28
In the Takisato dam reservoir, musty odor of 2-Methylisoborneol (2-MIB) has been caused by proliferation of Phormidium tenue in summer in some years. The peak of 2-MIB concentration is different by a year and lower than threshold level in some years. Therefore it is difficult to determine the conditions of generation of musty odor.
Proliferation tests of Phormidium tenue were carried out to investigate the occurrence condition of outbreak of cells and 2-MIB in the reservoir. In this test, suspend solid level of inflow river, especially phosphorous concentration, affected the growth rate of phormidium tenue. Proliferation tests of mixture algae using on-site sample were carried out. The ratio of nitrogen and phosphorous affects the growth rate of phormidium tenue. In this test growth rate of phormidium tenue was larger under lower N/P
